A new Fresnel Zone (FZ) Antenna to focus the microwave power in the radiation near field region is presented. FZ Antennas, in comparison with array antennas or reflector antennas, conventional focused antennas, take the advantages of design simplicity as well as lower sidelobe levels (SLL) in both axial and transverse directions. Simulation results and comparisons made between the new structure...

---This paper proposes a technique which improves Directivity and control of Beam-Steering by including metamaterial surfaces onto microstrip patch antenna superstrate used for wireless communication applications. Metamaterials are designed with Artificial Magnetic Conductor (AMC), inductive and capacitive planar structures. These structures allow obtaining Partially Reflective Surfaces (PRS). ...

In this paper, a novel design for coplanar waveguide antenna is developed which, consists of two U-shaped slots. The antenna is named Clip. The antenna is designed at central frequency of 2.4 GHZ with input impedance of 50Ω. The antenna dimensions represent 72% size reduction than conventional microstrip rectangular patch antenna. The measured antenna bandwidth is about 11% while its gain is ab...

The article presents the results of a study characteristics space parabolic mirror with deployable reflector. A model reflector truss structure formed by two asymmetric networks tension cables is presented. Three variants sparse reflecting film are presented, differing in periodically repeating hexagonal holes different sizes. complex electrodynamic modeling radiation antenna developed truss-be...

The wokbolic antenna is used to capture the 2.4 GHz wireless LAN signal. reflector made of a frying pan. Focus on using foil-lined paralon pipe. At focus given USB adapter signal reflected by reflector. To see feasibility tool needs be compared with equipment that has standard data sheet. So research was conducted comparing power directional parabolic antenna. method real experimental method, n...

The "extinction theorem" is used to prove that the fields of reflector antennas determined by integration of the current on the illuminated surface of the reflector are identical to the fields determined by aperture field integration with the Kottler-Franz formulas over any surface Sa that caps the reflector. As a corollary to this equivalence theorem, the fields predicted by integration of the...

where ν is the outer normal to A at the point where the light ray hits A. Suppose that we have a light source located at O, and Ω,Ω∗ are two domains in the sphere Sn−1, f(x) is a positive function for x ∈ Ω (input illumination intensity), and g(x∗) is a positive function for x∗ ∈ Ω∗ (output illumination intensity). If light emanates from O with intensity f(x) for x ∈ Ω, the far field reflector ...

The recently proposed concept of spring back reflectors has revolutionised the field of deployable antenna structures. The whole structure is made as a single piece from composite material, without any expensive and potentially unreliable joints, and it is simply folded elastically about a central axis, like a taco shell. Shape distortions occur during manufacturing and are difficult to correct...

Conventional reflector based Impulse Radiating Antennas (IRA’s) are designed with conical taper transmission line feed. A novel feed design approach is used to enhance gain of the IRA without increasing diameter of the reflector. This paper discus conventional and new IRA designs of different input impedances. IRA with conventional feed and with new dipole feed is designed for both 200 Ω and 10...